When Vladikov's transmission is interrupted by McHale's comedy show, Vladikov's hair goes back and forth from slicked back to dry.
During the final chase scene a boy falls overboard. An Ensign dives overboard to save him while wearing a life vest. The boat chase is at high speed exceeding 30 knots towards an island. The man and the boy beat the high speed boat to shore while swimming.
Whenever Vladikov goes to shoot a missile from his boat he always has 2 missiles there.
When Parker's dive suit inflates and he is floating, Virgil and Gruber enter the water to rescue him. The water's depth reaches each man's chest and wets their clothes. However, immediately afterward while in the base, their clothes are completely dry.
After shooting a rocket at McHale and Cobra turns around to go back to see what the explosion was they show the rocket launcher on Vladikov's boat with one rocket and a few seconds later there are 2 rockets. Vlad shoots 1 rocket and misses the helicopter a few seconds later there are 2 rockets again.Vlad shoots 1 rocket and hits the helicopter a few seconds later there are 2 rockets again.
McHale's dress uniform is missing his Command at Sea Pin. Command at Sea Pin is wore by Navy officers who are in command of a sea going vessel.
In Vladikov's jet-boat the controls are means to be in Russian. They use Cyrillic but all signs are actually nonsense.
In the Medal Ceremony at the end of the movie, Lt. Penelope Carpenter uniform is incorrect, in fact, does not exist in its shown form. She would be wearing a dress shirt with a black tie with full sided decorations.
In the boat chase scene near the end when Vladikov talks into the mic and puts it up to Roberto to talk into he has it backwards.
The "wireless microphone" at the awards scene on the baseball field is clearly just a Shure SM-57 (conventional dynamic mike) without the cable.
When Binghamton is talking to the troopers before his raid on Vladakov the gun in front of them is loaded with empty cartridges.
During the climactic sea battle Vladikov is talking into the back of his radio microphone.